This is done in the DNS world too. The unbound[1] resolver can pre-fetch a new record half way through the TTL if enough clients have requested it. That guaran

This is done in the DNS world too. The unbound[1] resolver can pre-fetch a new record half way through the TTL if enough clients have requested it. That guarantees that the cache remains hot for records that clients are requesting, but lets unused records expire. 1: https://nlnetlabs.nl/projects/unbound/about/ https://nlnetlabs.nl/projects/unbound/about/